Research on the Influence of Damaged Bore of a Large Caliber Machine Gun on Bullet Engraving Progress

SHEN Chao;ZHOU Ke-dong;LU Ye;QIAO Zi-ping

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2018, Vol. 39 ›› Issue (12) : 2320-2329. DOI: 10.3969/j.issn.1000-1093.2018.12.005
Paper

Research on the Influence of Damaged Bore of a Large Caliber Machine Gun on Bullet Engraving Progress

  • SHEN Chao1, ZHOU Ke-dong1, LU Ye1, QIAO Zi-ping2
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Abstract

In order to study the influence of damaged bore on the dynamic engraving process and find the key factors significantly influencing a barrel life, the accurate finite element analysis (FEA) models of large caliber machine gun barrels in different life periods are established based on the evolution rule of bore damage obtained through a large number of firing tests. The data of bullet surface morphology and moving posture during engraving process are obtained through numerical simulation which combines the interior ballistic process and the explicit finite element method through Fortran subroutines. The coupled model of bullet and gun barrel is proved to be effective by comparing the calculated results with experimental results. The simulated results show that three major influencing factors, such as the increase in the offset of bullet mass center and the swing angle of bullet, the variation in bulletsurface topography and aerodynamic parameters, and the reduction in the driving side force and rotational velocity of bullet due to the severely damaged driving side, result in the reduction in exterior ballistic flight stability and the barrel life end. Key

Key words

barrel / boredamage / bulletengraving / surfacemorphology / movingposture / finiteelementmethod

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SHEN Chao, ZHOU Ke-dong, LU Ye, QIAO Zi-ping. Research on the Influence of Damaged Bore of a Large Caliber Machine Gun on Bullet Engraving Progress. Acta Armamentarii. 2018, 39(12): 2320-2329 https://doi.org/10.3969/j.issn.1000-1093.2018.12.005

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第39卷第12期
2018年12月兵工学报ACTA
ARMAMENTARIIVol.39No.12Dec. 2018

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